just my two cents' worth - and I've never done altitude renders so it's only an uneducated guess - the texture on the ground is too busy. Even if it's meant to be forest, there's too much black speckling. same for the hills. wonder what would happen if you raised the jet up much higher, but banked it, and banked or rolled the camera as well? that way you might be able to get the jet and terrain in the same frame, but with a lot of distance and atmosphere in between. the other thing I've just noticed is the height of the clouds - they look as if they're miles above the jet. how about thinning the cloud-cover, and lowering it right down to the same level of the jet, or below it.